Tensioner pulley question

boo5t3d · 05-09-2014, 05:09 PM

I have an n54 e92 and wanted to change my belt and tensioner. So I order the kit off of ecstuning. It comes in and both pulleys on the tensioner are smooth. The one on my car is ribbed. I talked to rep at ecs and they say it's suppose to be smooth but I talked to my BMW rep here and he said the part number is correct but 1 pulley should be ribbed. Does anyone have the 2 smooth pulleys on their car? I'm worried about the belt slipping off. Pls let me know

blaster3500 · 05-09-2014, 05:49 PM

They are both smooth. Double check your stock one i bet it just has marks where the ribbed part of the belt runs. The ECS kit is INA and that is who makes the factory tensioner.

boo5t3d · 05-09-2014, 10:28 PM

I checked and it is not smooth on my stock one.

JOHNNY-5 · 05-09-2014, 10:42 PM

Quote:

Originally Posted by boo5t3d

I checked and it is not smooth on my stock one.

I have replaced the belt tensioner w/pulley, upper and lower deflector pulleys, and the drive belt on 2 E90's. The parts are oem bmw i ordered from the dealership. And the two pulleys on the tensioner are smooth, not ribbed.

boo5t3d · 05-10-2014, 07:35 AM

I have an oem tensioner on right now

05-09-2014, 05:09 PM	#1
boo5t3d Private First Class 10 Rep 187 Posts Drives: bmw 435 Join Date: Feb 2013 Location: toronto iTrader: (2)	Tensioner pulley question I have an n54 e92 and wanted to change my belt and tensioner. So I order the kit off of ecstuning. It comes in and both pulleys on the tensioner are smooth. The one on my car is ribbed. I talked to rep at ecs and they say it's suppose to be smooth but I talked to my BMW rep here and he said the part number is correct but 1 pulley should be ribbed. Does anyone have the 2 smooth pulleys on their car? I'm worried about the belt slipping off. Pls let me know
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05-09-2014, 05:49 PM	#2
blaster3500 Lieutenant 143 Rep 567 Posts Drives: 07 E90 335i Join Date: Aug 2010 Location: Seneca, SC iTrader: (7)	They are both smooth. Double check your stock one i bet it just has marks where the ribbed part of the belt runs. The ECS kit is INA and that is who makes the factory tensioner. __________________ 07 335 6MT
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05-09-2014, 10:28 PM	#3
boo5t3d Private First Class 10 Rep 187 Posts Drives: bmw 435 Join Date: Feb 2013 Location: toronto iTrader: (2)	I checked and it is not smooth on my stock one.
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05-10-2014, 07:35 AM	#5
boo5t3d Private First Class 10 Rep 187 Posts Drives: bmw 435 Join Date: Feb 2013 Location: toronto iTrader: (2)	I have an oem tensioner on right now Attached Images
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